LB Willis, LT Staley still not practicing

For the second straight day, linebacker Patrick Willis (hamstring) and left tackle Joe Staley (concussion) are not practicing.

During the portion of practice open to the media today, both players worked out an adjacent field under the supervision of strength and conditioning coach Mark Uyeyama

On Thursday, Staley said the concussion he suffered against Arizona was the most severe one he’s had in his career. Alex Boone, who signed a four-year contract extension last month, would make the first start of his three-year career if Staley is unable to play.

“If he’s not ready to go, I will be,” Boone said Thursday.

Larry Grant would make his second straight start if Willis is unable to play. Grant had a team-high nine tackles in last week’s 21-19 loss at Arizona.